Comp App -Sem 1 final

Which of the following commands is a valid Karel command?

• move

• move;

• move();

• move()

What makes the following command an invalid Karel command?

turnleft();

• It should end in a colon rather than a semicolon

• The l should be a capital L

• It should start with a capital T

• This command is correct

Which of the following is the correct way to define a turnRight function in Karel?

• function turnRight() {

  turnLeft();

  turnLeft();

  turnLeft();

  }

• function turnRight() {

  turnRight();

  turnRight();

  turnRight();

  }

• function turnRight {

  turnLeft();

  turnLeft();

  turnLeft();

  }

• turnRight function() {

  turnLeft();

  turnLeft();

  turnLeft();

  }

Why do we use functions in Karel programs?

• Break down our program into smaller parts

• Avoid repeating code

• All of the above

• All of the above

How many total times will Karel move in this program?

function start() {

move();

for (var i = 0; i < 5; i++) {

move();

putBall();

}

}

• 1

• 5

• 6

• 7

What is the proper format for a single line comment in Karel?

This is a comment

// This is a comment

/* This is a comment

This is a comment

• THIS IS A COMMENT

• // This is a comment

• /* This is a comment

• This is a comment

What does the mystery function do?

function mystery() {

while (noBallsPresent()) {

move();

}

}

• Karel moves until it is on a ball

• Karel moves once if there is no ball present

• Karel moves until it puts down a ball

• Karel checks if there is no ball on the current spot and then moves once

What condition should be used in this while loop to get Karel to pick up all the tennis balls on the current location?

while (________) {

takeBall();

}

• noBallsPresent()

• ballsPresent()

• frontIsClear()

• takeBall()

Why does a programmer indent their code?

• Helps show the structure of the code.

• Easier for other people to understand.

• A key part of good programming style

• All of the above

How can we teach Karel new commands?

• For loop

• While loop

• Define a new function

• The start function